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He added: "It is a great disappointment that the Welsh Government, Transport for Wales and the company that is under contract to them have failed to ensure that these services are in place, despite having sufficient time to do so before the new contract started.

"They should have made plans to ensure these services were provided properly."

First train in the new Transport for Wales colour scheme at Llandudno Junction

But Transport for Wales has said it is "fully committed" to the Welsh language.

Colin Lea, commercial and customer experience director Transport for Wales Rail Services, said: "We have an agreed and funded plan over the next 12 months to roll out more and better Welsh language provision for the benefit of our customers.

“We completely agree that our customers should be able to book their tickets in the Welsh language, so we are working with industry partners to find an answer where the technology and systems haven’t caught up.

Mair Bebb and dog Mili Jen are pictured with a police officer during a peaceful picket run by Welsh language society Cymdeithas Yr Iaith at Bangor Station. (Image: David Powell)

“At this stage, this data is only interpreted in the English language - for example this includes key elements such as the National Reservation System, which is only available in English.

“Solutions we are exploring may include the use of post-processed automatic translation systems. Please bear with us while we do our very best to put accurate Welsh language functionality in place as soon possible.”